Telegraphic transmitter.



P. DINGER. TBLEGRAPHIG TRANSMITTER. APPLICATION FILED JULY 25, 1907.

Patented Apr. 27, 1909.

l vENTu WITNESSES mounted.

UNITED STATES PATENT OFFICE.

PAUL DINGER, OF CLEVELAND, OHIO, ASSIGNOR OF ONE-HALF TO \V. LOUIS ROSE,OF CLEVELAND, OHIO.

TE LE GR APHIO TRANSMITTER EISSUED To all whom it may concern:

Be it known that I, PAUL DINGER, a citizen of the United States, andresident of Cleveland, in the county of Ouyahoga, State of Ohio, (withpost-oilice address at No. 3617 Revere O0urt,) have invented certain newand useful Improvements in Telegraphic Transmitters, of which thefollowing is a specification.

My invention relates to improvements in telegraphic instrumentstechnically known as transmitters and the objects of my improvement arefirst, to provide means for speed regulation which may be adjusted whilethe instrument is in use, second to enable also the regulation of theweight of dots while the instrument is used and third to provide means,which intensify the dot contact and also enable the use of theinstrument with the least possible fatigue on the part of the operator.

'A further object is to construct and arrange the cooperative parts ormembers of this instrument in a neat, compact and simple manner and toprovide for all necessary or desirable adjustments thereof.

I attain these objects in an instrument constructed and equippedsubstantially as illustrated in the accompanying drawings in which-Figure 1 represents a plan view of said in strument and Fig. 2 is afront side view of same.

Like letters of reference denote like parts in the drawings andspecification.

In Fig. 1 A indicates the base upon which all the parts hereinaftermentioned are B and O designate the binding posts for the circuit wire,of which the former is the grounded one and the latter the insulatedone. D indicates the circuit breaker lever. E designates the main leveror key, which is pivotally mounted upon the bracket F. G denotes themain vibrator which is also connected to the bracket F. A weight II hasfixed connection with said vibrator and may also be termed the hammer.Distant from the terminal (t of the vibrator is lo cated a-post J.

A screw I and spindle K are carried by said post one above the other.The terminal of the screw is grooved as at b and to the terminal of thespindle is attached a flexible 1nem ber c which connects with theresilient member d. The member 0 consists preferably of Specification ofLetters Patent.

Application filed July 25, 1907.

Patented April 27', 1909.

Serial No. 385,924.

a cord or string, while the member (Z is a spring which is attached tothe terminal (L of the vibrator.

L denotes an insulated bracket to which is attached the contact carrierspring c; f and g are contact points, which are respectively attached tothe vibrator G and spring c, Fig. 1.

In the post 7t is mounted the contact screw M, whereby dashes can betransmitted upon pushing the'lever E against said member M.

Between the weight II and stop N is arranged a bell crank lever 0 havingits pivotal support at 71. A rod connects the short arm t" with adepending portion of key E also to the long arm 1', is attached a meansfor exerting a forced contact toward the weight. Said means comprise thesupport or arm P, the screw rod 76 the spring Z, and link m; the lattermay be omitted upon connecting the spring l direct to the lever O.

Stop N above mentioned limits the extent of movement of the vibrator inone direction and stop It exerts opposition in the other d irection.

By the a plication of the spring controlled bell crank lever O theoperator is enabled to withhold the said member away from the hammer IIsimply by a mere touch upon the lever or key E, since the spring Zoilers diminished resistance the more its line of force approaches thepivot i of said lever. By means of the rod j the lever O can be drawnaway from the vibrator and by means of the link m and accessories thelong arm of the lever O strikes and bears against the vibrator weight orhammer with increasing force the more the lever tilts toward the hammer,the rebounding ellect is therefore also enhanced and the contact pointsfand g eilect distinct and sharp dots when such are in tended to be madeupon releasing the key E at inter vals as the tenor of the message mayrequire.

For the production of dashes the key must be pushed toward the contact Msince the springs Z and o are so adjusted. as to normally hold the key Edistant from contact M.

The posts O and 71 are di-electric with the base but between themselvesthey are arranged in circuit by means of the bar p underneath the base(see dotted lines in Fig. l).

The bracket IJ is di-electrie with the base but held fixed thereto bymeans of the post h, an arm q of said bracket extemls toward the circuitbreaker I).

The speed and gravity of dots can be adjusted by means of the spindle Kand screw I. Upon winding the cord 0 around said spindle I the spring (Zcan be strained to effect the activity of the vibrator and by l means ofthe screw I which has a groove connection with said cord the distancebetween the contact points f and 9 can be regulated as to gravity of thedots produced by said 1 contacts. In fact all parts as seen from thedrawings are rendered adjustable so as to enable a proper cooperation ofconnected parts intended to produce functions as above mentioned.

V' hat I claim and desire to secure by Letters Patent is:

1. In a telegraphic transmitter the combination with the main vibratorof fixed weight, a speed and contact adjusting device and bell cranklever connected with the key under spring tension in such manner as toimpart accelerated force toward said vibrator for the purpose ofproducing sharp distinct dots.

2. In telegraph transmitter, the combination of vibrator, a key lever,means under the control of the key lever for imparting to the vibratorthe energy required to initiate 3 its vibration and for preventing itfrom vibrating, means for pulling with a variable and yielding forceupon said vibrator in substantially the direction of its length.

3. In a telegraph transmitter, the combination of a vibrator, a keylever, means under the control of the key lever to move and hold thevibrator in a constrained position to one side of its natural position,contractile coiled spring arranged with its axis insubstantial alinementwith the vibrator, whi

spring is attached at one end to the vibrator, and means pulling uponthe other end of the spring, substantially in the line of its axis.

4. In a telegraph transmitter, the combination of a vibrator, a keylever, means under the control of the key lever to move and hold thevibrator in a constrained position to one side of its natural position,a contractile coiled spring; arranged with its axis in substantialalinement with the vibrator, which spring is attached at one end to thevibrator, means pulling upon the other end of the spring, substantiallyin the line of its axis, and means whereby the tension of said springmay be varied by varying the force of said pull.

5. In a telegraph transmitter, the combination of a vibrator, a keylever, means under the control of the key lever to move and hold thevibrator in a constrained position to one side of its natural position,a contractile coiled spring arranged with its axis in substantialalinement with the vibrator, which spring is attached at one end to thevibrator, means pulling upon the other end of the spring; substantiallyin the line of itsaxis, and means whereby the direction of the pull onsaid spring may be slightly changed.

6. In a telegraph transmitter, the combination of a vibrator in the formof a spring, bar fixed at one end, a coil spring secured by 1 one of itsends to the free end of the vibrator,

a iiexible cord secured to the other end of said spring, and means fortaking in and paying out said cord.

7. In a telegraph transmitter, the combination of a vibrator in the formof a spring bar fixed at one end, a coil spring secured byof said cord.

PAUL DINGER.

lVitnesses BERNHARD F. EiBLER, J. 0. JAMES.

